//
// detail/io_control.hpp
// ~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef ASIO_DETAIL_IO_CONTROL_HPP
#define ASIO_DETAIL_IO_CONTROL_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"
#include <cstddef>
#include "asio/detail/socket_types.hpp"

#include "asio/detail/push_options.hpp"

namespace asio {
    namespace detail {
        namespace io_control {

// I/O control command for getting number of bytes available.
            class bytes_readable {
            public:
                // Default constructor.
                bytes_readable()
                        : value_(0) {
                }

                // Construct with a specific command value.
                bytes_readable(std::size_t value)
                        : value_(static_cast<detail::ioctl_arg_type>(value)) {
                }

                // Get the name of the IO control command.
                int name() const {
                    return static_cast<int>(ASIO_OS_DEF(FIONREAD));
                }

                // Set the value of the I/O control command.
                void set(std::size_t value) {
                    value_ = static_cast<detail::ioctl_arg_type>(value);
                }

                // Get the current value of the I/O control command.
                std::size_t get() const {
                    return static_cast<std::size_t>(value_);
                }

                // Get the address of the command data.
                detail::ioctl_arg_type *data() {
                    return &value_;
                }

                // Get the address of the command data.
                const detail::ioctl_arg_type *data() const {
                    return &value_;
                }

            private:
                detail::ioctl_arg_type value_;
            };

        } // namespace io_control
    } // namespace detail
} // namespace asio

#include "asio/detail/pop_options.hpp"

#endif // ASIO_DETAIL_IO_CONTROL_HPP
